Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9dadd66f3a0efd…

MALICIOUS

PDF

53.8 KB Created: 2020-08-16 12:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68c57f556afc9b5a959b03009c1885ff SHA-1: a6ea497a9f172a73d47bf81c91adf0e9a5958ca6 SHA-256: 4c9dadd66f3a0efd7e060724614a4fad4b12a9526e750b9345435ac3fca4a11c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to a 'Chicago manual of style citation generator' and an embedded URL pointing to 'ttraff.ru', which is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=chicago+manual+of+style+citation+generator In PDF document text
    • http://files.morrisadvohealth.com/uploads/1/3/0/7/130776324/lamofoji-jipibe-buxinubefopes-geluk.pdfIn PDF document text
    • http://domapase.aasca.org/uploads/1/3/1/3/131383483/podurojigi-doxiwate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/nakosiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/askeb_abortus_inkomplit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0404/3170/files/48981920101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/tunoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/92628626636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/3542571544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/xepomenaloveluwizin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/32268400945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/fukefigajemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/vernier_caliper_least_count.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/nagetog.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000950e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950E 5300 bytes
SHA-256: 7eb78bf8ec5d1fab7dc05092c7c0af1d48041d813158109252f1974dbcf7124b
font_01_sfnt_off0000a6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F9 10236 bytes
SHA-256: 6886776eb55672c37d4aef9d58c408777c2dd3cd4b27a5f11db46eaf6bd9efd6

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